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403- Prenatal Development
N/A
26
Anatomy
Undergraduate 4
12/12/2012

Additional Anatomy Flashcards

 


 

Cards

Term
pregnancy
Definition

time of childbearing from mother's point of view

 

40 weeks

Term
gestation period
Definition

time span from fertilization to birth from child's point of view

 

38 weeks

Term
prenatal period
Definition

before birth

 

embryo (0-2 mo)+ fetus (2mo- birth)

Term
embryonic stage
Definition

0- 8 weeks

organogenesis

tissue differentiation

Term
fetal stage
Definition

9 weeks to birth

growth and differentiation

end of 3rd mo. functioning placenta

Term
neonatal period
Definition
first 42 days after birth
Term
stages from fertilization to implantation (5)
Definition

1) fertilization- 12-24 hours

2) cleavage- 1st 30 hours

3) morula- 3-4 days

4) blastocyst- 4.5-5 days

5) implantation in uterus- 6 days

Term
path of sperm through egg
Definition
corona radiata (surrounding cells) -> zona pellucida -> plasma membrane
Term
blastocyst
Definition

hollow ball of cells (after cleavage and morula formation)

enters uterine cavity on day 5

 

cells differentiate into inner cell mass and tropoblast

 

Term
totipotent
Definition

can make ANY cell, most potent

 

ex: zygote

Term
pluripotent
Definition

3 germ layers: endoderm, mesoderm, ectoderm

 

ex: inner cell mass

 

after further specialization = multipotent

Term
multipotent
Definition

adult stem cells

 

ex: specific blood type

Term
dedcidua
Definition

implantation site in endometrium

 

mother's contribution to the placenta

Term
gastrulation
Definition
development of 3 primary germ layers
Term
what does the endoderm form?
Definition

epithelia of GI, urogenital, respiratory

all inner linings

Term
what does the mesoderm form?
Definition
muscle, bone, cartilage, blood, CTs
Term
what does the ectoderm form?
Definition
epidermis of skin and nervous system
Term
neurulation
Definition

development of brain, spine, spinal cord, nerves

 

day 17-22

Term
anencephaly
Definition
no skull, or head
Term
spina bifida
Definition
failure of closing of neural tube
Term
yolk sac
Definition

early blood formation

gonadal stem cells

from endoderm

Term
amnion
Definition

from ectoderm

surrounds embryo with fluid: shock absorber, regulates body temp, prevents adhesions

filtrates mother's blood

Term
chorion
Definition

embryonic placenta

from trophoblasts and mesoderm

exchange of nutrients

Term
mature placenta
Definition

amnionic membrane + chorionic membrane

3rd month

Term
arteries and veins of umbilical cord
Definition

2 arteries AWAY from fetus

1 vein TOWARDS fetus

Term
limiting factor for viability
Definition
maturation of respiratory system
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